All Questions
Tagged with concurrency ios
483
questions
1
vote
1
answer
94
views
Passing argument of non-sendable type '(any URLSessionTaskDelegate)?' outside of main actor-isolated context may introduce data races
I am using SwiftUI and I declared the View as @MainActor to resolve some of the concurrency warnings. However, I still get the warning
Passing argument of non-sendable type '(any ...
- 13
0
votes
1
answer
102
views
How to convert AdMob `GADFullScreenContentDelegate` to Swift 6 concurrency
This is a similar problem to How to convert `VNDocumentCameraViewControllerDelegate` to Swift 6 Concurrency but one warning is new, so this may require different solution.
I have the following code:
@...
- 1,308
0
votes
1
answer
75
views
How to convert `VNDocumentCameraViewControllerDelegate` to Swift 6 Concurrency
So I have this code:
fileprivate class DocumentScanDelegate: NSObject, VNDocumentCameraViewControllerDelegate {
static let shared = DocumentScanDelegate()
var compressionQuality: CGFloat = 1
...
- 1,308
1
vote
1
answer
62
views
How to mark Vision text recognition result as Sendable in Swift 6
I have the following code. It simply run Vision API to get the text from the image. I use very simple GCD to dispatch the heavy Vision operation to the background queue, and then dispatch it back to ...
- 1,308
2
votes
1
answer
279
views
Strict concurrency and Swift 6 produces error when trying to convert PhotosPickerItem to Data
I have the below view where I want to load an image from gallery using PhotosPicker and display it to the user. I also want to convert the image to Data so I can store it in SwiftData database.
After ...
- 216
0
votes
0
answers
44
views
NIO Event Loops and Swift async/await
I'm using swift-grpc which uses swift-nio under the hood. I'm having a hard time reconciling my understanding of Event Loops in the context of async/await. Using the following code as a reference:
...
- 2,531
2
votes
2
answers
169
views
mach_task_self_ is not concurrency-safe because it involves shared mutable state
I have a function that returns the memory use of a device. It uses mach_task_self_ which gives a warning that it is not concurrency-safe.
task_info(mach_task_self_, task_flavor_t(TASK_VM_INFO), intPtr,...
- 10.2k
0
votes
1
answer
50
views
Execution of synchronously submitted work items on different threads in iOS
Are synchronously dispatched work items executed always on the main thread in iOS independent of anything (whether they are dispatched to a concurrent, serial, global, or custom queue)?
I checked ...
- 19
0
votes
0
answers
38
views
Intermittent Issue with Removing Snapshot View from MapView in iOS
I am facing an intermittent issue with removing a snapshot view from a MKMapView in my iOS app. The snapshot view is added to the map view as there was a white screen while the satelite view is ...
- 133
1
vote
2
answers
141
views
Dangling pointer in concurrent read/write access to array
I am trying to understand what't wrong in my approach of access to array. In my app I got several not reproducible crashes with EXC_BAD_ACCESS KERN_INVALID_ADDRESS (some not 0 address). I suggested ...
- 217
3
votes
2
answers
217
views
Possible concurrency issue with ForEach and array of @State
I added a screen recording below so the issue is even clearer. I'm struggling to understand why bindings (async) update differently when dealing with arrays, and much more reliably when dealing with ...
- 1,629
0
votes
2
answers
373
views
Fixing warnings of non-conformance to "Sendable" for ImageResource in Swift 5.10
I have a file with some constants that maps enums to associated ImageResource for simplified usage in other places. Sample is below
static let imagePreviews: [MyEnum: ImageResource] = [
.Enum1: ....
- 45.8k
0
votes
1
answer
93
views
I need help structuring my data in my SwiftUI application. I have a mutating func in my struct but the "if let" mutates the copy and not original
I'm building a SwiftUI application and one of my Models has a mutating func that's purpose is to help update the UI when changes occur. For example, if a user updates their username I want to just ...
- 57
0
votes
1
answer
124
views
Hows does DispatchGroup().leave() function correctly across different threads?
I was reading this warning about releasing a lock across different threads:
The NSLock class uses POSIX threads to implement its locking behavior. When sending an unlock message to an NSLock object, ...
- 2,990
3
votes
4
answers
1k
views
Swift async let Task throws Cancellation Exception if not Awaited
I am new to Swift Concurrency and trying to understand Task -> ChildTask relationship.
I created here two Tasks
Parent Task :
(1)Calls the test() method in Actor from MainThread.
(3.2)The Actor ...
- 180